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adjustable propeller
ground-adjustable propeller
negative thrust propeller / negative-thrust propeller
non-uniform pitch propeller
effective pitch of propeller
geometric(al) pitch of propeller
variable-pitch propeller
controllable-pitch propeller
fixed-pitch propeller
Up (Pitch 90 deg) / Down (Pitch -90 deg) Reference
adjustable legs
adjustable head space feature
adjustable breaker point
adjustable cam
adjustable charge
adjustable choke
adjustable fire line height
adjustable mould
adjustable rear sight
adjustable ring
adjustable screw wrench
adjustable sight
adjustable speed transmission
adjustable trigger pull
adjustable upper sling swivel
adjustable valve
adjustable vane
adjustable
height-adjustable seat
internal adjustable scope
adjustable orifice
adjustable stabilizer